noun
colored gemstone; gemstone other than diamond
Wasei-eigo from English 'color stone'. Refers to precious or semi-precious gemstones that are not diamonds, such as rubies, sapphires, and emeralds. Used in jewelry contexts.
wasei-eigo (Japanese-coined English), from color stone
婚約指輪にはダイヤモンドではなくカラーストーンを選んだ。
For the engagement ring, I chose a colored gemstone instead of a diamond.
このネックレスには小さなカラーストーンがいくつかあしらわれている。
This necklace is set with several small colored gemstones.